celestia housing - battle arena

so i have looked at the celestia house (the space eone) and i thinked it looked pretty awesome 8). i saw the battle arena in the middle and im wording if it actually functions. does that mean you can invite friends over and duel or do monsters appear or what? thanks for any info!

It is a functional PVP house battle arena where you can practice PVP with your friends or whoever is at your home, no monsters unfortunately. There are 3 houses that have these home battle circles, Celestia Observatory, Massive Fantasy Palace, and Sultun's Palace.